Brooks patented, self-contained Polyphase Heavy-Duty A to S adapter (PHD) with dead- front safety shield is a simple cost-effective way to replace polyphase bottom-connected meters with modern socket-type meters. The PHD fits in the same mounting positions as the original bottom-connected polyphase meter, or can be used in new installations. The PHD features increased current-carrying capacity: 3/0 conductors; copper (200 amp, 165 amp continuous); 600 volt. Adapter is rain tight and rated NEMA 3R for Indoor and Outdoor use.